MH523芯片 MH1608C单片机开发程序源码 -

/**
****************************************************************
* @file rc523.c
*
* @brief rc523 driver.
*
* @author
*
*
****************************************************************
*/
/*
* INCLUDE FILES
****************************************************************
*/
#include "define.h"
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include "stc_new_8051.h"
#include "spi.h"
#include "uart.h"
#include "timer.h"
#include "iso14443_4.h"
#include "mh523.h"
#define FIFO_SIZE 64
#define FSD 256 //Frame Size for proximity coupling Device
#define READ_REG_CTRL 0x80
#define TP_FWT_302us 2048
#define TP_dFWT 192
#define MAX_RX_REQ_WAIT_MS 5000 // 命令等待超时时间100ms
transceive_buffer XDATA mf_com_data;
/**
****************************************************************
* @brief pcd_init()
*
* 初始化芯片
*
* @param:
* @return:
* @retval:
****************************************************************
*/
void pcd_init()
{
pcd_poweron();
mdelay(5);
pcd_reset();
mdelay(5);
pcd_config('A');
}
/**
****************************************************************
* @brief pcd_config()
*
* 配置芯片的A/B模式
*
* @param: u8 type
* @return:
* @retval:
****************************************************************
*/
char pcd_config(u8 type)
{
pcd_antenna_off();
mdelay(7);
if ('A' == type)
{
clear_bit_mask(Status2Reg, BIT3);
clear_bit_mask(ComIEnReg, BIT7); // 高电平
write_reg(ModeReg,0x3D); // 11 // CRC seed:6363
write_reg(RxSelReg, 0x86);//RxWait
write_reg(RFCfgReg, 0x58); //
write_reg(TxASKReg, 0x40);//15 //typeA
write_reg(TxModeReg, 0x00);//12 //Tx Framing A
write_reg(RxModeReg, 0x00);//13 //Rx framing A
write_reg(0x0C, 0x10); //^_^
//兼容配置
{
u8 backup, adc;
backup = read_reg(0x37);
write_reg(0x37, 0x00);
adc = read_reg(0x37);
if (adc == 0x11)
{
write_reg(0x26, 0x48);
write_reg(0x37, 0x5E);
write_reg(0x17, 0x88);
write_reg(0x38, 0x6B);
write_reg(0x3A, 0x23);
write_reg(0x29, 0x12);//0x0F); //调制指数
write_reg(0x3b, 0x25);
}
else if (adc == 0x12)
{
// 以下寄存器必须按顺序配置
write_reg(0x37, 0x5E);
write_reg(0x26, 0x48);
write_reg(0x17, 0x88);
write_reg(0x29, 0x12);//0x0F); //调制指数
write_reg(0x35, 0xED);
write_reg(0x3b, 0xA5);
write_reg(0x37, 0xAE);
write_reg(0x3b, 0x72);
}
write_reg(0x37, backup);
}
}
else if ('B' == type)
{
write_reg(Status2Reg, 0x00); //清MFCrypto1On
clear_bit_mask(ComIEnReg, BIT7);// 高电平触发中断
write_reg(ModeReg, 0x3F); // CRC seed:FFFF
write_reg(RxSelReg, 0x88); //RxWait
//Tx
write_reg(GsNReg, 0xF8); //调制系数
write_reg(CWGsPReg, 0x3F); //
write_reg(ModGsPReg, 0x12); //调制指数
write_reg(AutoTestReg, 0x00);
write_reg(TxASKReg, 0x00); // typeB
write_reg(TypeBReg, 0x13);
write_reg(TxModeReg, 0x83); //Tx Framing B
write_reg(RxModeReg, 0x83); //Rx framing B
write_reg(BitFramingReg, 0x00); //TxLastBits=0
//兼容配置
{
u8 backup, adc;
backup = read_reg(0x37);
write_reg(0x37, 0x00);
adc = read_reg(0x37);
if (adc == 0x11)
{
write_reg(0x37, 0x5E);
write_reg(0x17, 0x88);
write_reg(0x3A, 0x23);
write_reg(0x38, 0x6B);
write_reg(0x29, 0x12);//0x0F); //调制指数
write_reg(0x3b, 0x25);
}
else if (adc == 0x12)
{
write_reg(0x37, 0x5E);
write_reg(0x26, 0x48);
write_reg(0x17, 0x88);
write_reg(0x29, 0x12);
write_reg(0x35, 0xED);
write_reg(0x3b, 0xE5);//改为E5 write_reg(0x3b, 0xA5);
//write_reg(0x37, 0xAE);//去掉
//write_reg(0x3b, 0x72);//去掉
}
write_reg(0x37, backup);
}
}
else
{
return USER_ERROR;
}
pcd_antenna_on();
mdelay(2);
return MI_OK;
}
/**
****************************************************************
* @brief pcd_com_transceive()
*
* 通过芯片和ISO14443卡通讯
*
* @param: pi->mf_command = 芯片命令字
* @param: pi->mf_length = 发送的数据长度
* @param: pi->mf_data[] = 发送数据
* @return: status 值为MI_OK:成功
* @retval: pi->mf_length = 接收的数据BIT长度
* @retval: pi->mf_data[] = 接收数据
****************************************************************
*/
char pcd_com_transceive(struct transceive_buffer *pi)
{
u8 XDATA recebyte;
char XDATA status;
u8 XDATA irq_en;
u8 XDATA wait_for;
u8 XDATA last_bits;
u8 XDATA j;
u8 XDATA val;
u8 XDATA err;
u8 irq_inv;
u16 len_rest;
u8 len;
u8 WATER_LEVEL;
len = 0;
len_rest = 0;
err = 0;
recebyte = 0;
irq_en = 0;
wait_for = 0;
switch (pi->mf_command)
{
case PCD_IDLE:
irq_en = 0x00;
wait_for = 0x00;
break;
case PCD_AUTHENT:
irq_en = IdleIEn | TimerIEn;
wait_for = IdleIRq;
break;
case PCD_RECEIVE:
irq_en = RxIEn | IdleIEn;
wait_for = RxIRq;
recebyte=1;
break;
case PCD_TRANSMIT:
irq_en = TxIEn | IdleIEn;
wait_for = TxIRq;
break;
case PCD_TRANSCEIVE:
irq_en = RxIEn | IdleIEn | TimerIEn | TxIEn;
wait_for = RxIRq;
recebyte=1;
break;
default:
pi->mf_command = MI_UNKNOWN_COMMAND;
break;
}
WATER_LEVEL = read_reg(WaterLevelReg);
if (pi->mf_command != MI_UNKNOWN_COMMAND
&& (((pi->mf_command == PCD_TRANSCEIVE || pi->mf_command == PCD_TRANSMIT) && pi->mf_length > 0)
|| (pi->mf_command != PCD_TRANSCEIVE && pi->mf_command != PCD_TRANSMIT))
)
{
write_reg(CommandReg, PCD_IDLE);
irq_inv = read_reg(ComIEnReg) & BIT7;
write_reg(ComIEnReg, irq_inv |irq_en | BIT0);//使能Timer 定时器中断
write_reg(ComIrqReg, 0x7F); //Clear INT
write_reg(DivIrqReg, 0x7F); //Clear INT
//Flush Fifo
set_bit_mask(FIFOLevelReg, BIT7);
if (pi->mf_command == PCD_TRANSCEIVE || pi->mf_command == PCD_TRANSMIT || pi->mf_command == PCD_AUTHENT)
{
#if (NFC_DEBUG)
printf(" PCD_tx:");
#endif
for (j = 0; j < pi->mf_length; j++)
{
#if (NFC_DEBUG)
printf("%02x ", (u16)pi->mf_data[j]);
#endif
}
#if (NFC_DEBUG)
printf("\n");
#endif
len_rest = pi->mf_length;
if (len_rest >= FIFO_SIZE)
{
len = FIFO_SIZE;
}else
{
len = len_rest;
}
for (j = 0; j < len; j++)
{
write_reg(FIFODataReg, pi->mf_data[j]);
}
len_rest -= len;//Rest bytes
if (len_rest != 0)
{
write_reg(ComIrqReg, BIT2); // clear LoAlertIRq
set_bit_mask(ComIEnReg, BIT2);// enable LoAlertIRq
}
write_reg(CommandReg, pi->mf_command);
if (pi->mf_command == PCD_TRANSCEIVE)
{
set_bit_mask(BitFramingReg,0x80);
}
while (len_rest != 0)
{
while(INT_PIN == 0);//Wait LoAlertIRq
if (len_rest > (FIFO_SIZE - WATER_LEVEL))
{
len = FIFO_SIZE - WATER_LEVEL;
}
else
{
len = len_rest;
}
for (j = 0; j < len; j++)
{
write_reg(FIFODataReg, pi->mf_data[pi->mf_length - len_rest + j]);
}
write_reg(ComIrqReg, BIT2);//在write fifo之后，再清除中断标记才可以
//printf("\n8 comirq=%02bx,ien=%02bx,INT= %bd \n", read_reg(ComIrqReg), read_reg(ComIEnReg), (u8)INT_PIN);
len_rest -= len;//Rest bytes
if (len_rest == 0)
{
clear_bit_mask(ComIEnReg, BIT2);// disable LoAlertIRq
//printf("\n9 comirq=%02bx,ien=%02bx,INT= %bd \n", read_reg(ComIrqReg), read_reg(ComIEnReg), (u8)INT_PIN);
}
}
//Wait TxIRq
while (INT_PIN == 0);
val = read_reg(ComIrqReg);
if (val & TxIRq)
{
write_reg(ComIrqReg, TxIRq);
if(pi->mf_command == PCD_TRANSMIT)
{
return 0;
}
}
}
if (PCD_RECEIVE == pi->mf_command)
{
set_bit_mask(ControlReg, BIT6);// TStartNow
}
len_rest = 0; // bytes received
write_reg(ComIrqReg, BIT3); // clear HoAlertIRq
set_bit_mask(ComIEnReg, BIT3); // enable HoAlertIRq
//等待命令执行完成
while(INT_PIN == 0);
while(1)
{
while(0 == INT_PIN);
val = read_reg(ComIrqReg);
if ((val & BIT3) && !(val & BIT5))
{
if (len_rest + FIFO_SIZE - WATER_LEVEL > 255)
{
#if (NFC_DEBUG)
printf("AF RX_LEN > 255B\n");
#endif
break;
}
for (j = 0; j <FIFO_SIZE - WATER_LEVEL; j++)
{
pi->mf_data[len_rest + j] = read_reg(FIFODataReg);
}
write_reg(ComIrqReg, BIT3);//在read fifo之后，再清除中断标记才可以
len_rest += FIFO_SIZE - WATER_LEVEL;
}
else
{
clear_bit_mask(ComIEnReg, BIT3);//disable HoAlertIRq
break;
}
}
val = read_reg(ComIrqReg);
#if (NFC_DEBUG)
printf(" INT:fflvl=%d,rxlst=%02bx ,ien=%02bx,cirq=%02bx\n", (u16)read_reg(FIFOLevelReg),read_reg(ControlReg)&0x07,read_reg(ComIEnReg), val);//XU
#endif
write_reg(ComIrqReg, val);// 清中断
if (val & BIT0)
{//发生超时
status = MI_NOTAGERR;
}
else
{
err = read_reg(ErrorReg);
status = MI_COM_ERR;
if ((val & wait_for) && (val & irq_en))
{
if (!(val & ErrIRq))
{//指令执行正确
status = MI_OK;
if (recebyte)
{
val = 0x7F & read_reg(FIFOLevelReg);
last_bits = read_reg(ControlReg) & 0x07;
if (len_rest + val > MAX_TRX_BUF_SIZE)
{//长度过长超出缓存
status = MI_COM_ERR;
#if (NFC_DEBUG)
printf("RX_LEN > 255B\n");
#endif
}
else
{
if (last_bits && val) //防止spi读错后 val-1成为负值
{
pi->mf_length = (val-1)*8 + last_bits;
}
else
{
pi->mf_length = val*8;
}
pi->mf_length += len_rest*8;
#if (NFC_DEBUG)
printf(" RX:len=%02x,dat:", (u16)pi->mf_length);
#endif
if (val == 0)
{
val = 1;
}
for (j = 0; j < val; j++)
{
pi->mf_data[len_rest + j] = read_reg(FIFODataReg);
}
#if (NFC_DEBUG)
for (j = 0; j < pi->mf_length/8 + !!(pi->mf_length%8); j++)
{
// if (j > 4)
// {
// printf("..");
// break;
// }
// else
// {
printf("%02X ", (u16)pi->mf_data[j]);
// }
//printf("%02X ", (u16)pi->mf_data[j]);
}
//printf("l=%d", pi->mf_length/8 + !!(pi->mf_length%8));
printf("\n");
#endif
}
}
}
else if ((err & CollErr) && (!(read_reg(CollReg) & BIT5)))
{//a bit-collision is detected
status = MI_COLLERR;
if (recebyte)
{
val = 0x7F & read_reg(FIFOLevelReg);
last_bits = read_reg(ControlReg) & 0x07;
if (len_rest + val > MAX_TRX_BUF_SIZE)
{//长度过长超出缓存
#if (NFC_DEBUG)
printf("COLL RX_LEN > 255B\n");
#endif
}
else
{
if (last_bits && val) //防止spi读错后 val-1成为负值
{
pi->mf_length = (val-1)*8 + last_bits;
}
else
{
pi->mf_length = val*8;
}
pi->mf_length += len_rest*8;
#if (NFC_DEBUG)
printf(" RX: pi_cmd=%02x,pi_len=%02x,pi_dat:", (u16)pi->mf_command, (u16)pi->mf_length);
#endif
if (val == 0)
{
val = 1;
}
for (j = 0; j < val; j++)
{
pi->mf_data[len_rest + j +1] = read_reg(FIFODataReg);
}
#if (NFC_DEBUG)
for (j = 0; j < pi->mf_length/8 + !!(pi->mf_length%8); j++)
{
printf("%02X ", (u16)pi->mf_data[j+1]);
}
printf("\n");
#endif
}
}
pi->mf_data[0] = (read_reg(CollReg) & CollPos);
if (pi->mf_data[0] == 0)
{
pi->mf_data[0] = 32;
}
#if(NFC_DEBUG)
printf("\n COLL_DET pos=%02x\n", (u16)pi->mf_data[0]);
#endif
pi->mf_data[0]--;// 与之前版本有点映射区别，为了不改变上层代码，这里直接减一；
}
else if ((err & CollErr) && (read_reg(CollReg) & BIT5))
{
//printf("COLL_DET,but CollPosNotValid=1\n");
}
//else if (err & (CrcErr | ParityErr | ProtocolErr))
else if (err & (ProtocolErr))
{
#if (NFC_DEBUG)
printf("protocol err=%b02x\n", err);
#endif
status = MI_FRAMINGERR;
}
else if ((err & (CrcErr | ParityErr)) && !(err &ProtocolErr) )
{
//EMV parity err EMV 307.2.3.4
val = 0x7F & read_reg(FIFOLevelReg);
last_bits = read_reg(ControlReg) & 0x07;
if (len_rest + val > MAX_TRX_BUF_SIZE)
{//长度过长超出缓存
status = MI_COM_ERR;
#if (NFC_DEBUG)
printf("RX_LEN > 255B\n");
#endif
}
else
{
if (last_bits && val)
{
pi->mf_length = (val-1)*8 + last_bits;
}
else
{
pi->mf_length = val*8;
}
pi->mf_length += len_rest*8;
}
#if (NFC_DEBUG)
printf("crc-parity err=%b02x\n", err);
printf("l=%d\n", pi->mf_length );
#endif
status = MI_INTEGRITY_ERR;
}
else
{
#if (NFC_DEBUG)
printf("unknown ErrorReg=%02bx\n", err);
#endif
status = MI_INTEGRITY_ERR;
}
}
else
{
status = MI_COM_ERR;
#if (NFC_DEBUG)
printf(" MI_COM_ERR\n");
#endif
}
}
set_bit_mask(ControlReg, BIT7);// TStopNow =1,必要的；
write_reg(ComIrqReg, 0x7F);// 清中断0
write_reg(DivIrqReg, 0x7F);// 清中断1
clear_bit_mask(ComIEnReg, 0x7F);//清中断使能,最高位是控制位
clear_bit_mask(DivIEnReg, 0x7F);//清中断使能,最高位是控制位
write_reg(CommandReg, PCD_IDLE);
}
else
{
status = USER_ERROR;
#if (NFC_DEBUG)
printf("USER_ERROR\n");
#endif
}
#if (NFC_DEBUG)
printf(" pcd_com: sta=%bd,err=%02bx\n", status, err);
#endif
return status;
}
void pcd_reset()
{
#if(NFC_DEBUG)
printf("pcd_reset\n");
#endif
write_reg(CommandReg, PCD_RESETPHASE); //软复位数字芯片
}
void pcd_antenna_on()
{
write_reg(TxControlReg, read_reg(TxControlReg) | 0x03); //Tx1RFEn=1 Tx2RFEn=1
}
void pcd_antenna_off()
{
write_reg(TxControlReg, read_reg(TxControlReg) & (~0x03));
}
/////////////////////////////////////////////////////////////////////
//设置PCD定时器
//input:fwi=0~15
/////////////////////////////////////////////////////////////////////
void pcd_set_tmo(u8 fwi)
{
write_reg(TPrescalerReg, (TP_FWT_302us) & 0xFF);
write_reg(TModeReg, BIT7 | (((TP_FWT_302us)>>8) & 0xFF));
write_reg(TReloadRegL, (1 << fwi) & 0xFF);
write_reg(TReloadRegH, ((1 << fwi) & 0xFF00) >> 8);
}
void pcd_delay_sfgi(u8 sfgi)
{
//SFGT = (SFGT+dSFGT) = [(256 x 16/fc) x 2^SFGI] + [384/fc x 2^SFGI]
//dSFGT = 384 x 2^FWI / fc
write_reg(TPrescalerReg, (TP_FWT_302us + TP_dFWT) & 0xFF);
write_reg(TModeReg, BIT7 | (((TP_FWT_302us + TP_dFWT)>>8) & 0xFF));
if (sfgi > 14 || sfgi < 1)
{//FDTA,PCD,MIN = 6078 * 1 / fc
sfgi = 1;
}
write_reg(TReloadRegL, (1 << sfgi) & 0xFF);
write_reg(TReloadRegH, ((1 << sfgi) >> 8) & 0xFF);
write_reg(ComIrqReg, 0x7F);//清除中断
write_reg(ComIEnReg, BIT0);
clear_bit_mask(TModeReg,BIT7);// clear TAuto
set_bit_mask(ControlReg,BIT6);// set TStartNow
while(!INT_PIN);// wait new INT
//set_bit_mask(TModeReg,BIT7);// recover TAuto
pcd_set_tmo(g_pcd_module_info.ui_fwi); //recover timeout set
}
void pcd_lpcd_config_start(u8 delta, u32 t_inactivity_ms, u8 skip_times, t_detect_us)
{
u8 XDATA WUPeriod;
u8 XDATA SwingsCnt;
#if (NFC_DEBUG)
printf("pcd_lpcd_config_start\n");
#endif
WUPeriod = t_inactivity_ms * 32.768 / 256 + 0.5;
SwingsCnt = t_detect_us * 27.12 / 2 / 16 + 0.5;
write_reg(0x01,0x0F); //先复位寄存器再进行lpcd
write_reg(0x14, 0x8B); // Tx2CW = 1 ，continue载波发射打开
write_reg(0x37, 0x00);//恢复版本号
write_reg(0x37, 0x5e); // 打开私有寄存器保护开关
write_reg(0x3c, 0x30 | delta); //设置Delta[3:0]的值, 开启32k
write_reg(0x3d, WUPeriod); //设置休眠时间
write_reg(0x3e, 0x80 | ((skip_times & 0x07) << 4) | (SwingsCnt & 0x0F)); //开启LPCD_en设置,跳过探测次数，探测时间
write_reg(0x37, 0x00); // 关闭私有寄存器保护开关
write_reg(0x03, 0x20); //打开卡探测中断使能
write_reg(0x01, 0x10); //PCD soft powerdown
//具体应用相关，本示例工程配置为高电平为有中断
clear_bit_mask(0x02, BIT7);
}
/*
lpcd功能开始函数
*/
void pcd_lpcd_start()
{
#if (NFC_DEBUG)
printf("pcd_lpcd_start\n");
#endif
write_reg(0x01,0x0F); //先复位寄存器再进行lpcd
write_reg(0x37, 0x00);//恢复版本号
if (read_reg(0x37) == 0x10)
{
write_reg(0x01, 0x00); // idle
}
write_reg(0x14, 0x8B); // Tx2CW = 1 ，continue载波发射打开
write_reg(0x37, 0x5e); // 打开私有寄存器保护开关
//write_reg(0x3c, 0x30); //设置Delta[3:0]的值, 开启32k //0 不能使用
//write_reg(0x3c, 0x31); //设置Delta[3:0]的值, 开启32k
//write_reg(0x3c, 0x32); //设置Delta[3:0]的值, 开启32k
//write_reg(0x3c, 0x33); //设置Delta[3:0]的值, 开启32k
//write_reg(0x3c, 0x34); //设置Delta[3:0]的值, 开启32k
//write_reg(0x3c, 0x35); //设置Delta[3:0]的值, 开启32k XU
write_reg(0x3c, 0x37); //设置Delta[3:0]的值, 开启32k XU
//write_reg(0x3c, 0x3A); //设置Delta[3:0]的值, 开启32k XU
//write_reg(0x3c, 0x3F); //设置Delta[3:0]的值, 开启32k XU
write_reg(0x3d, 0x0d); //设置休眠时间
write_reg(0x3e, 0x95); //设置连续探测次数，开启LPCD_en
write_reg(0x37, 0x00); // 关闭私有寄存器保护开关
write_reg(0x03, 0x20); //打开卡探测中断使能
write_reg(0x01, 0x10); //PCD soft powerdown
//具体应用相关，配置为高电平为有中断
clear_bit_mask(0x02, BIT7);
}
void pcd_lpcd_end()
{
#if (NFC_DEBUG)
printf("pcd_lpcd_end\n");
#endif
write_reg(0x01,0x0F); //先复位寄存器再进行lpcd
}
u8 pcd_lpcd_check()
{
if (INT_PIN && (read_reg(DivIrqReg) & BIT5)) //TagDetIrq
{
write_reg(DivIrqReg, BIT5); //清除卡检测到中断
pcd_lpcd_end();
return TRUE;
}
return FALSE;
}
#if 0
void page45_lock()
{
write_reg(VersionReg, 0);
}
//打开芯片的page4私有寄存器的写保护
void page4_unlock()
{
write_reg(VersionReg, 0x5E);
}
//打开芯片的page5私有寄存器的写保护
void page5_unlock();
{
write_reg(VersionReg, 0xAE);
}
#endif
void pcd_set_rate(u8 rate)
{
u8 val,rxwait;
switch(rate)
{
case '1':
clear_bit_mask(TxModeReg, BIT4 | BIT5 | BIT6);
clear_bit_mask(RxModeReg, BIT4 | BIT5 | BIT6);
write_reg(ModWidthReg, 0x26);//Miller Pulse Length
write_reg(RxSelReg, 0x88);
break;
case '2':
clear_bit_mask(TxModeReg, BIT4 | BIT5 | BIT6);
set_bit_mask(TxModeReg, BIT4);
clear_bit_mask(RxModeReg, BIT4 | BIT5 | BIT6);
set_bit_mask(RxModeReg, BIT4);
write_reg(ModWidthReg, 0x12);//Miller Pulse Length
//rxwait相对于106基本速率需增加相应倍数
val = read_reg(RxSelReg);
rxwait = ((val & 0x3F)*2);
if (rxwait > 0x3F)
{
rxwait = 0x3F;
}
write_reg(RxSelReg,(rxwait | (val & 0xC0)));
break;
case '4':
clear_bit_mask(TxModeReg, BIT4 | BIT5 | BIT6);
set_bit_mask(TxModeReg, BIT5);
clear_bit_mask(RxModeReg, BIT4 | BIT5 | BIT6);
set_bit_mask(RxModeReg, BIT5);
write_reg(ModWidthReg, 0x0A);//Miller Pulse Length
//rxwait相对于106基本速率需增加相应倍数
val = read_reg(RxSelReg);
rxwait = ((val & 0x3F)*4);
if (rxwait > 0x3F)
{
rxwait = 0x3F;
}
write_reg(RxSelReg,(rxwait | (val & 0xC0)));
break;
default:
clear_bit_mask(TxModeReg, BIT4 | BIT5 | BIT6);
clear_bit_mask(RxModeReg, BIT4 | BIT5 | BIT6);
write_reg(ModWidthReg, 0x26);//Miller Pulse Length
break;
}
{//不同速率选择不同带宽
u8 adc;
write_reg(0x37, 0x00);
adc = read_reg(0x37);
if (adc == 0x12)
{
if (rate == '8' || rate == '4')//848k,424k
{
write_reg(0x3B, 0x25);
}
else if (rate == '2' || rate == '1')// 212k, 106k
{
write_reg(0x3B, 0xE5);
}
}
}
}
#if 0
void calculate_crc(u8 *pin, u8 len, u8 *pout)
{
u8 XDATA i, n;
clear_bit_mask(DivIrqReg, 0x04);
write_reg(CommandReg, PCD_IDLE);
set_bit_mask(FIFOLevelReg, 0x80);
for (i = 0; i < len; i++)
{
write_reg(FIFODataReg, *(pin + i));
}
write_reg(CommandReg, PCD_CALCCRC);
i = 0xFF;
do
{
n = read_reg(DivIrqReg);
i--;
}while((i!=0) && !(n&0x04));
#if (NFC_DEBUG)
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